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How do I contract a selection of all pixels in Photoshop?


Question

I have a series of images with a 1px border included in the picture. I need to get rid of that border. The logical route seemed to be Select > All and then Select > Modify > Contract... by 1 px. Unfortunately, when all pixels in a layer are selected, Photoshop (CS6 in my case) greys out all Select > Modify option but Border.... This seems to be an ancient 'bug', introduced in Ps CS3.

How can I work around this 'bug', preferably in a way that allows me to automate the process in an action?

2014/06/11
1
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6/11/2014 3:49:00 PM

Accepted Answer

What about the Trim feature? If the pixel border around the images is a solid colour or transparent Trim would work. You might have to play around with it a bit, but you should be able to use it to do what you are asking.

Image > Trim...

enter image description here

2014/06/11
2
6/11/2014 4:01:00 PM

A quick workaround is to use the one Modify option still available: Border. Border for the amount of pixels you want to trim off the image, reverse the selection (Select > Inverse or Shift+Ctrl/Option+I) and Image > Crop.

2014/06/11